diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 24e71bc86..de99ee93c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -86,7 +86,7 @@ repository contains language tests that are shared among the main Sass
 implementations. Any new feature should be thoroughly tested there, and any bug
 should have a regression test added.
 
-[sass-spec]: http://github.com/sass/sass-spec
+[sass-spec]: https://github.com/sass/sass-spec
 
 To create a new spec:
 
diff --git a/bin/sass.dart b/bin/sass.dart
index a95ad65ba..9114fcf5c 100644
--- a/bin/sass.dart
+++ b/bin/sass.dart
@@ -83,7 +83,7 @@ Future<void> main(List<String> args) async {
             options.trace ? getTrace(error) ?? stackTrace : null);
 
         // Exit code 65 indicates invalid data per
-        // http://www.freebsd.org/cgi/man.cgi?query=sysexits.
+        // https://www.freebsd.org/cgi/man.cgi?query=sysexits.
         //
         // We let exitCode 66 take precedence for deterministic behavior.
         if (exitCode != 66) exitCode = 65;
diff --git a/lib/src/parse/parser.dart b/lib/src/parse/parser.dart
index 58c1e73e1..dd8f27439 100644
--- a/lib/src/parse/parser.dart
+++ b/lib/src/parse/parser.dart
@@ -626,7 +626,7 @@ class Parser {
     return result;
   }
 
-  /// Consumes [text] as an identifer, but doesn't verify whether there's
+  /// Consumes [text] as an identifier, but doesn't verify whether there's
   /// additional identifier text afterwards.
   ///
   /// Returns `true` if the full [text] is consumed and `false` otherwise, but
diff --git a/lib/src/parse/stylesheet.dart b/lib/src/parse/stylesheet.dart
index d0bc43dbc..d15801f28 100644
--- a/lib/src/parse/stylesheet.dart
+++ b/lib/src/parse/stylesheet.dart
@@ -1715,7 +1715,7 @@ abstract class StylesheetParser extends Parser {
     var wasInParentheses = _inParentheses;
 
     // We use the convention below of referring to nullable variables that are
-    // shared across anonymous functions in this method with a trailling
+    // shared across anonymous functions in this method with a trailing
     // underscore. This allows us to copy them to non-underscored local
     // variables to make it easier for Dart's type system to reason about their
     // local nullability.
diff --git a/lib/src/value/color.dart b/lib/src/value/color.dart
index 3d3db20f2..d3845559e 100644
--- a/lib/src/value/color.dart
+++ b/lib/src/value/color.dart
@@ -293,7 +293,7 @@ class SassColor extends Value {
   }
 
   /// An algorithm from the CSS3 spec:
-  /// http://www.w3.org/TR/css3-color/#hsl-color.
+  /// https://www.w3.org/TR/css3-color/#hsl-color.
   static double _hueToRgb(double m1, double m2, double hue) {
     if (hue < 0) hue += 1;
     if (hue > 1) hue -= 1;
diff --git a/lib/src/value/number.dart b/lib/src/value/number.dart
index 87c159b96..9a5821bfd 100644
--- a/lib/src/value/number.dart
+++ b/lib/src/value/number.dart
@@ -143,7 +143,7 @@ const _conversions = {
   },
 };
 
-/// A map from human-readable names of unit types to the convertable units that
+/// A map from human-readable names of unit types to the convertible units that
 /// fall into those types.
 const _unitsByType = {
   "length": ["in", "cm", "pc", "mm", "q", "pt", "px"],
diff --git a/lib/src/visitor/async_evaluate.dart b/lib/src/visitor/async_evaluate.dart
index fa531c557..2e4377a75 100644
--- a/lib/src/visitor/async_evaluate.dart
+++ b/lib/src/visitor/async_evaluate.dart
@@ -3611,7 +3611,7 @@ class _EvaluationContext implements EvaluationContext {
   final _EvaluateVisitor _visitor;
 
   /// The AST node whose span should be used for [warn] if no other span is
-  /// avaiable.
+  /// available.
   final AstNode _defaultWarnNodeWithSpan;
 
   _EvaluationContext(this._visitor, this._defaultWarnNodeWithSpan);
diff --git a/lib/src/visitor/evaluate.dart b/lib/src/visitor/evaluate.dart
index 90246c89e..acae74825 100644
--- a/lib/src/visitor/evaluate.dart
+++ b/lib/src/visitor/evaluate.dart
@@ -5,7 +5,7 @@
 // DO NOT EDIT. This file was generated from async_evaluate.dart.
 // See tool/grind/synchronize.dart for details.
 //
-// Checksum: a8472983eeb4c8348befed4953326f285b68c4a8
+// Checksum: d5cb0fe933051782cbfb79ee3d65bc4353471f11
 //
 // ignore_for_file: unused_import
 
@@ -3548,7 +3548,7 @@ class _EvaluationContext implements EvaluationContext {
   final _EvaluateVisitor _visitor;
 
   /// The AST node whose span should be used for [warn] if no other span is
-  /// avaiable.
+  /// available.
   final AstNode _defaultWarnNodeWithSpan;
 
   _EvaluationContext(this._visitor, this._defaultWarnNodeWithSpan);
diff --git a/lib/src/visitor/find_dependencies.dart b/lib/src/visitor/find_dependencies.dart
index 1e60abd87..ca4dfb934 100644
--- a/lib/src/visitor/find_dependencies.dart
+++ b/lib/src/visitor/find_dependencies.dart
@@ -80,7 +80,7 @@ class _FindDependenciesVisitor with RecursiveStatementVisitor {
 
 /// A struct of different types of dependencies a Sass stylesheet can contain.
 class DependencyReport {
-  /// An unmodifiable set of all `@use`d URLs in the stylesheet (exluding
+  /// An unmodifiable set of all `@use`d URLs in the stylesheet (excluding
   /// built-in modules).
   final Set<Uri> uses;